That's strange: for me it didn't even come close to doubling the course size. I had topped out at around 3000 words before the update, so I was expecting around 6000 after the update. But Lingvist just informed me I've completed the course at 3945 words.

Guten Morgen @talgoxe ! Sorry for the confusion. The German course will eventually have 5000 cards. Instead of making users wait until all of them are ready however, we have decided that we will do it in two stages: to 4k first and then to 5k in the next while. :)